<style>
    .box-image{
        margin-top: 6px;
        margin-right: 5px;
        margin-bottom: 6px;
        height: 120;
        width: 150;
        float: left;
    }
    .desc-cat{
        padding: 6px;
    }
</style>
<div id="center" style="width: 620px;">
    <div class="box-image"><img src="engine/img/prod/logo_alcea.png" /></div>
    <div class="box-image"><img src="engine/img/prod/logo_ard.png" /></div>
    <div class="box-image"><img src="engine/img/prod/logo_barbetti.png" /></div>
    <div class="box-image"><img src="engine/img/prod/logo_basf.png" /></div>
    <div class="box-image"><img src="engine/img/prod/logo_biocalce.png" /></div>
    <div class="box-image"><img src="engine/img/prod/logo_bovelacci.png" /></div>
    <div class="box-image"><img src="engine/img/prod/logo_caparol.png" /></div>
    <div class="box-image"><img src="engine/img/prod/logo_ecovic.png" /></div>
    <div class="box-image"><img src="engine/img/prod/logo_giorgiograesan.png" /></div>
    <div class="box-image"><img src="engine/img/prod/logo_herbol.png" /></div>
    <div class="box-image"><img src="engine/img/prod/logo_jcolors.png" /></div>
    <div class="box-image"><img src="engine/img/prod/logo_knauf.png" /></div>
    <div class="box-image"><img src="engine/img/prod/logo_lafarge.png" /></div>
    <div class="box-image"><img src="engine/img/prod/logo_mapei.png" /></div>
    <div class="box-image"><img src="engine/img/prod/logo_oikos.png" /></div>
    <div class="box-image"><img src="engine/img/prod/logo_sanmarco.png" /></div>
    <div class="box-image"><img src="engine/img/prod/logo_sikkens.png" /></div>
    <div class="box-image"><img src="engine/img/prod/logo_vip.png" /></div>
</div>